| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a game system and an information storage medium capable of realizing a realistic image expression with a low processing load. SOLUTION: Transformation of a positional coordinate system of definition point S1, S2, etc., of an object OB2 to an imaginary point coordinate system (XP, YP, ZP) set to an imaginary point P of an object OB1 is carried out, and on the basis of the positional coordinates of the definition points after transformation of the coordinate system, an image drawing vector N is found. On the basis of the image drawing vector N, a primitive face matching the object OB2 is drawn in an image drawing (texture) area. A normal line vector of the object OB1 in the imaginary point coordinate system is found, and on the basis of the texture coordinate specified by the normal line vector in the imaginary point coordinate system, mapping of the image in the image drawing area is carried out to the object OB1. Using a plurality of light source objects, a glow expression texture may be formed. On the basis of a depth value specified by a distance between the imaginary point P and the definition point, a hidden-surface between the primitive faces on the image drawing area is removed. In the image drawing area, a clearance area formed by curling of the backward primitive face is filled up.</p> |
